Mailing list discussion about the search against the JAP anonymizing proxy is taking off on FITUG's debate mailing list; a quickly-updated unofficial archive is here.
Kristian Köhntopp has details about Saturday's search: Apparently, police threatened to confiscate the hardware on which the anonymization service is run, unless the data were turned over. Rigo Wenning observes that the "dubious" practices used by police to route around the a possible future court decision are what you get when a legal system doesn't have the "fruits of a poisonous tree" rule.